Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 51-56 |
| Seitenumfang | 6 |
| Fachzeitschrift | Laser Physics |
| Jahrgang | 14 |
| Ausgabenummer | 1 |
| Publikationsstatus | Veröffentlicht - Jan. 2004 |
| Extern publiziert | Ja |
Abstract
A novel mechanism of hole-assisted energy absorption by dielectric materials interacting with ultrashort laser pulses of moderate intensity (below damage threshold) is proposed. The analytical theory of multiphoton absorption is generalized to the cases of hole-assisted processes in laser fields of arbitrary polarization. Numerical simulations of the non-stationary Schrödinger equation in one-dimensional model systems are performed to gauge the validity of the analytical theory. Large (up to several orders of magnitude) enhancements of the multiphoton transition rates are found both numerically and analytically. The applicability of the analytical theory is confirmed up to relatively high Keldysh parameters.We also describe a second novel mechanism of energy absorption: laser-assisted electron avalanche in dielectric materials. Unlike the traditional avalanche, in this process, collisional excitation of new electrons to the conduction band occurs without heating the already free electrons to energies above the bandgap energy. This process should dominate for ultra-short laser pulses which do not give enough time for the development of the traditional avalanche.
ASJC Scopus Sachgebiete
- Physik und Astronomie (insg.)
- Atom- und Molekularphysik sowie Optik
- Physik und Astronomie (insg.)
- Instrumentierung
- Physik und Astronomie (insg.)
- Physik der kondensierten Materie
- Ingenieurwesen (insg.)
- Wirtschaftsingenieurwesen und Fertigungstechnik
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in: Laser Physics, Jahrgang 14, Nr. 1, 01.2004, S. 51-56.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Hole-Assisted Energy Deposition in Clusters and Dielectrics in Multiphoton Regime
AU - Yudin, G. L.
AU - Gaier, L. N.
AU - Lein, Manfred
AU - Knight, Peter L.
AU - Corkum, P. B.
AU - Ivanov, M. Yu
N1 - Copyright: Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2004/1
Y1 - 2004/1
N2 - A novel mechanism of hole-assisted energy absorption by dielectric materials interacting with ultrashort laser pulses of moderate intensity (below damage threshold) is proposed. The analytical theory of multiphoton absorption is generalized to the cases of hole-assisted processes in laser fields of arbitrary polarization. Numerical simulations of the non-stationary Schrödinger equation in one-dimensional model systems are performed to gauge the validity of the analytical theory. Large (up to several orders of magnitude) enhancements of the multiphoton transition rates are found both numerically and analytically. The applicability of the analytical theory is confirmed up to relatively high Keldysh parameters.We also describe a second novel mechanism of energy absorption: laser-assisted electron avalanche in dielectric materials. Unlike the traditional avalanche, in this process, collisional excitation of new electrons to the conduction band occurs without heating the already free electrons to energies above the bandgap energy. This process should dominate for ultra-short laser pulses which do not give enough time for the development of the traditional avalanche.
AB - A novel mechanism of hole-assisted energy absorption by dielectric materials interacting with ultrashort laser pulses of moderate intensity (below damage threshold) is proposed. The analytical theory of multiphoton absorption is generalized to the cases of hole-assisted processes in laser fields of arbitrary polarization. Numerical simulations of the non-stationary Schrödinger equation in one-dimensional model systems are performed to gauge the validity of the analytical theory. Large (up to several orders of magnitude) enhancements of the multiphoton transition rates are found both numerically and analytically. The applicability of the analytical theory is confirmed up to relatively high Keldysh parameters.We also describe a second novel mechanism of energy absorption: laser-assisted electron avalanche in dielectric materials. Unlike the traditional avalanche, in this process, collisional excitation of new electrons to the conduction band occurs without heating the already free electrons to energies above the bandgap energy. This process should dominate for ultra-short laser pulses which do not give enough time for the development of the traditional avalanche.
UR - http://www.scopus.com/inward/record.url?scp=1342306358&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:1342306358
VL - 14
SP - 51
EP - 56
JO - Laser Physics
JF - Laser Physics
SN - 1054-660X
IS - 1
ER -